light_world.lua/postshader.lua
2014-03-28 03:32:32 +01:00

128 lines
4.9 KiB
Lua

LOVE_POSTSHADER_BUFFER_RENDER = love.graphics.newCanvas()
LOVE_POSTSHADER_BUFFER_BACK = love.graphics.newCanvas()
LOVE_POSTSHADER_LAST_BUFFER = nil
LOVE_POSTSHADER_BLURV = love.graphics.newShader("shader/blurv.glsl")
LOVE_POSTSHADER_BLURH = love.graphics.newShader("shader/blurh.glsl")
LOVE_POSTSHADER_CONTRAST = love.graphics.newShader("shader/contrast.glsl")
LOVE_POSTSHADER_CHROMATIC_ABERRATION = love.graphics.newShader("shader/chromatic_aberration.glsl")
LOVE_POSTSHADER_FOUR_COLOR = love.graphics.newShader("shader/four_colors.glsl")
LOVE_POSTSHADER_MONOCHROM = love.graphics.newShader("shader/monochrom.glsl")
LOVE_POSTSHADER_SCANLINES = love.graphics.newShader("shader/scanlines.glsl")
LOVE_POSTSHADER_TILT_SHIFT = love.graphics.newShader("shader/tilt_shift.glsl")
LOVE_POSTSHADER_BLURV:send("screen", {love.window.getWidth(), love.window.getHeight()})
LOVE_POSTSHADER_BLURH:send("screen", {love.window.getWidth(), love.window.getHeight()})
LOVE_POSTSHADER_SCANLINES:send("screenHeight", {love.window.getWidth(), love.window.getHeight()})
love.postshader = {}
love.postshader.setBuffer = function(path)
if path == "back" then
love.graphics.setCanvas(LOVE_POSTSHADER_BUFFER_BACK)
else
love.graphics.setCanvas(LOVE_POSTSHADER_BUFFER_RENDER)
end
LOVE_POSTSHADER_LAST_BUFFER = love.graphics.getCanvas()
end
love.postshader.addEffect = function(shader, ...)
args = {...}
LOVE_POSTSHADER_LAST_BUFFER = love.graphics.getCanvas()
love.graphics.setCanvas(LOVE_POSTSHADER_BUFFER_BACK)
love.graphics.setBlendMode("alpha")
if shader == "bloom" then
-- Bloom Shader
LOVE_POSTSHADER_BLURV:send("steps", args[1] or 2.0)
LOVE_POSTSHADER_BLURH:send("steps", args[1] or 2.0)
love.graphics.setShader(LOVE_POSTSHADER_BLURV)
love.graphics.draw(LOVE_POSTSHADER_BUFFER_RENDER)
love.graphics.setShader(LOVE_POSTSHADER_BLURH)
love.graphics.draw(LOVE_POSTSHADER_BUFFER_BACK)
love.graphics.setShader(LOVE_POSTSHADER_CONTRAST)
love.graphics.draw(LOVE_POSTSHADER_BUFFER_BACK)
love.graphics.setCanvas(LOVE_POSTSHADER_LAST_BUFFER)
love.graphics.setShader()
love.graphics.setColor(255, 255, 255)
love.graphics.draw(LOVE_POSTSHADER_BUFFER_RENDER)
love.graphics.setBlendMode("additive")
love.graphics.setColor(255, 255, 255, (args[2] or 0.25) * 255)
love.graphics.draw(LOVE_POSTSHADER_BUFFER_BACK)
love.graphics.setBlendMode("alpha")
elseif shader == "blur" then
-- Blur Shader
LOVE_POSTSHADER_BLURV:send("steps", args[1] or 2.0)
LOVE_POSTSHADER_BLURH:send("steps", args[2] or 2.0)
love.graphics.setShader(LOVE_POSTSHADER_BLURV)
love.graphics.draw(LOVE_POSTSHADER_BUFFER_RENDER)
love.graphics.setShader(LOVE_POSTSHADER_BLURH)
love.graphics.draw(LOVE_POSTSHADER_BUFFER_BACK)
elseif shader == "chromatic" then
-- Chromatic Shader
LOVE_POSTSHADER_CHROMATIC_ABERRATION:send("redStrength", {args[1] or 0.0, args[2] or 0.0})
LOVE_POSTSHADER_CHROMATIC_ABERRATION:send("greenStrength", {args[3] or 0.0, args[4] or 0.0})
LOVE_POSTSHADER_CHROMATIC_ABERRATION:send("blueStrength", {args[5] or 0.0, args[6] or 0.0})
love.graphics.setCanvas(LOVE_POSTSHADER_BUFFER_BACK)
love.graphics.setShader(LOVE_POSTSHADER_CHROMATIC_ABERRATION)
love.graphics.draw(LOVE_POSTSHADER_BUFFER_RENDER)
elseif shader == "4colors" then
-- 4 Color Shader
for i = 1, 4 do
for k = 1, 3 do
args[i][k] = args[i][k] / 255.0
end
end
LOVE_POSTSHADER_FOUR_COLOR:send("palette", args[1], args[2], args[3], args[4])
love.graphics.setShader(LOVE_POSTSHADER_FOUR_COLOR)
love.graphics.draw(LOVE_POSTSHADER_BUFFER_RENDER)
elseif shader == "monochrom" then
-- Monochrom Shader
LOVE_POSTSHADER_MONOCHROM:send("time", love.timer.getTime())
love.graphics.setShader(LOVE_POSTSHADER_MONOCHROM)
love.graphics.draw(LOVE_POSTSHADER_BUFFER_RENDER)
elseif shader == "scanlines" then
-- Scanlines Shader
LOVE_POSTSHADER_SCANLINES:send("time", love.timer.getTime())
love.graphics.setShader(LOVE_POSTSHADER_SCANLINES)
love.graphics.draw(LOVE_POSTSHADER_BUFFER_RENDER)
elseif shader == "tiltshift" then
-- Blur Shader
LOVE_POSTSHADER_BLURV:send("steps", args[1] or 2.0)
LOVE_POSTSHADER_BLURH:send("steps", args[1] or 2.0)
love.graphics.setShader(LOVE_POSTSHADER_BLURV)
love.graphics.draw(LOVE_POSTSHADER_BUFFER_RENDER)
love.graphics.setShader(LOVE_POSTSHADER_BLURH)
love.graphics.draw(LOVE_POSTSHADER_BUFFER_BACK)
LOVE_POSTSHADER_TILT_SHIFT:send("buffer", LOVE_POSTSHADER_BUFFER_RENDER)
love.graphics.setShader(LOVE_POSTSHADER_TILT_SHIFT)
love.graphics.draw(LOVE_POSTSHADER_BUFFER_BACK)
end
if shader ~= "bloom" then
love.graphics.setBlendMode("alpha")
love.graphics.setCanvas(LOVE_POSTSHADER_LAST_BUFFER)
love.graphics.setShader()
love.graphics.setColor(255, 255, 255)
love.graphics.draw(LOVE_POSTSHADER_BUFFER_BACK)
end
end
love.postshader.draw = function()
if LOVE_POSTSHADER_LAST_BUFFER then
love.graphics.setCanvas()
love.graphics.setShader()
love.graphics.setColor(255, 255, 255)
love.graphics.draw(LOVE_POSTSHADER_LAST_BUFFER)
end
end